[issue41490] Update bundled pip to 20.2.1 and setuptools to 49.2.1

[Jason R. Coombs]

Jason R. Coombs <jaraco at jaraco.com> added the comment:


New changeset df8d4c83a6e1727e766191896aeabde886979587 by Jason R. Coombs in branch 'master':
bpo-41490: ``path`` and ``contents`` to aggressively close handles (#22915)
https://github.com/python/cpython/commit/df8d4c83a6e1727e766191896aeabde886979587


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